TAT9988

CATV GaN Power Doubler MMIC

Preliminary Datasheet: Rev G 10-07-14

- 8 of 11 -

Disclaimer: Subject to change without notice

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Pin Configuration and Description

Pin No. Function

Description

3

Non-Inverting Amplifier Input

Requires AC coupling from input balun

4

Linearizer Current-Adjust

Connect to VDD through resistors R4 and R8

6,7

Common Source Node

DC GND. DC resistance to be minimized from this node to GND.

9

Amplifier Current-Adjust

Connect to VDD through resistor R3.

10

Inverting Amplifier Input

Requires AC coupling from input balun

20

Feedback to Inverting Input

Connects to non-inverting output (Pin 24). Path is layout sensitive

and should be kept as short as possible.

24

Non-Inverting Amplifier Output

RF choke required to VDD through output transformer center tap.

26

Output Device Gate Bias 1

Set to 3.25V using resistive divider network between VDD and

GND.

27

Output Device Gate Bias 2

Set to 3.25V using resistive divider network between VDD and

GND.

29

Inverting Amplifier Output

RF choke required to VDD through output transformer center tap.

33

Feedback to Non-Inverting Input

Connects to inverting output (Pin 29). Path is layout sensitive and

should be kept as short as possible.

Backside

Paddle

RF/DC GND

Very low DC, RF and thermal resistance required from this node to

the heatsink. Recommended via pattern should be followed to

minimize thermal resistance.